Fuel-feeding system



C. F. GREEN.

FUEL FEEDING SYSTEM.

APPLICATION HLED Nov.18.1918.

Patented Aug. 3, 192%,

Fael Pump A v INVENTOR,

Fuel P/pe @fee/7 A TTORNE Y 7o Carburetor CHARLES E.' GREEN, or DEEIANCE, omo,

CORPORATION, or TOLEDO', oHro, A CORPORATION 0E DELAWARE.

ASSIGNOR TO INDUSTRIAL RESEARCH- FUEL-EEEDING SYSTEM.

neaseoc.

Specificationof, Letters Patent.

Patenten aug. e, ieee.

application filed November 18, 1918. Serial No. 262,992.

Improvements in' Fuel-Feeding Systems, of which I declare the following to be a full,

clear, and exact description. f l

My invention relates to improvements in fuel feeding systems and has for its object to provide more particularly simple and inexpensive means by which the fuel is transferred from the main fuel supply source to the carbureter of the engine.

A further object of the invention is to provide a combined fuel and oil feeding pump adapted to be actuated through means driven b the engine orv other power unit for supp ying fuel and lubricating material thereto.

A still further object of the invention is to provide an improved gravity feed tank interposed between the pump and suction producing apparatus and the main fuel suppl`source.

0 these and other ends the invention comprises certain novel features of construction and arrangement of parts as will bev hereinafter more fully pointed out in the specification and claims, it being understood that various changes in the detalled form of construction and arrangement of parts may be made without departing from the spirit of the invention. l

A structure illustrating one embodiment of the present invention is shown in the accompanyin drawings in which:`

Figure is a da 4 tratin the manner o connecting `the engine with t e fuel supply source.

Fig. Il is Aan enlarged vertical sectionI through the gravity feed tank and valveV casing therein.

` Fig. IH is a vertical section through the pump taken on the line 3,-3'o'f l ls- L Like referenceA characters indicate like parts in the several figures of the-drawlngs. Referring to thedrawin s, 1() represents an engine of 'any preferre type having a 5@ carburetor 11 connected with the bottom of a gravity -feed tank 12 by means of aconduit 13, while the fuel pump 14 is connected with l the top of said tank byxmeans of the conduit rammatic view illusdisposed tube 38 l5. is below'the level of the carbureter is con# nected with the bottom of the gravity feed Vtank by means of the conduit 17 -and there is an overflow conduit 18 leading from the top of the gravity feed tank back to the main supply tank as shown in Fig. I.

he pump is connected with the crank casing 19 of thelengine by means vof the conduit 20 and the discharge conduit from the pump tothe engine is indicated at 21. The double purpose pump shown in section in Fig. III is provided with an oil receiving chamber 22 located between the inlet valve 23 and the outlet valve 24 which are normally held upon their seats by the springs 25 and'26 respectively. These valves control the oil inlet and outlet passageways 27 and 28, the former being connected with the bottom of the crank case of the engine by the conduit 20 and the latter with the engine casing by means of the conduit 21 as shown in Fig. I.

The pump is provided with anextended sleeve 29 forming a cylinder communicating with the oil 4receiving chamber 22 and reciprocally mounted in said cylinder is a hollow piston 30 extending slightly beyondY the outer end of the cylinder in contact with the cam 31 of the cam shaft 32 which is preferably employed for actuating the piston in one direction, although the same may be actuated by any other moving part of the engine or separate power unit. The piston 30 is provided with a stem or rod 33 forming a secondV piston for producing suction and compression pulsations in the conduit 15 and tank 12, one end of said piston being seatedin-the outer end of the oil pumping `piston and the other end in lthe bearing or -recess 34 which communicates with the con-y duit 15 through the threaded connection 35 shown in Fig. III. The pistons are actuated outwardly by means of the spring 36 surrounding the piston rod as shown in Fig.

III. The inner end of the piston 33 is pro-' vided with a series of oil retaining grooves 37 for supplying lubricating material to that portion of the small piston which re- V ciprocate's in the bearing or recess 34.

Thetank 12 is provided with a vertically communicating with, the Suction Conduitl 15 through the` E. 39 at the The main fuel supply tank .16 which 4 -top of the tank while the bottom of said tube communicates with the valve chamber of the valve casing 41 which has a threaded extension 42 projecting through the bottom of the gravity feedtank and Ycommunicating with the carbureter supply pipe 13. The extension 42 is provided with a recess 43 normally held closed by the ball valve 44actuated by the spring 45 in the chamber 40.

The valve casing 41 is provided with a lateral extension 46 having a fuel inletl 47 normally closed by the ball valve 48 in the chamber 49 of the extension, said valve being held normally seated by the spring 50, the outer end of which is seated upon the screw cap 51 having the fuel discharge port 52, as shown in Fig. Il. The valve casing 41 is retained in position upon the tank by means of the nut 53, on the threaded extension 42 of said casing, said extension being connected with the fuel supply conduit leading to the main tank 16.

At the top ofthe gravity feed tank 12 is sa short pipe 54. connected with the overiow conduit' 18 by means of the union or coupling 55, said pipe 54 being provided with a screwv cap 56 having an air inlet port 57 therein in order that` atmospheric pressure may bie maintained in said tank to insure the discharge of the liquid through the outlet 58 .f and conduit 13 leading to the carbureter.

In the operation of my improved device the smaller piston 33, which is connected with and actuated by the larger oil pumping piston 30 is reciprocated in the passage 34 to produce suction and compression pulsations inthe conduit 15 and gravity feed tank 12 for thespurpose of-lifting the fuel from the f main supply tank 16 through the conduit 17 to be discharged past the ball valve 44 into the chamber 40 on the suction stroke and thence. past the ball -valve 48 into the gravity feed tank on the compression stroke` ofsaid piston.v

Likewise the larger or oil pumping 'piston 30 draws oil from the bottom of the engine crank casing through the conduit 20, past the ball valve 23 and into a chamber 22 from whence it is forced past the ball valve 24 through the passage 28 and back to the engine through the conduit 21, both of said pistons being actuated simultaneouslyl by means of the spring 36 and cam 31.\Should the gravity feed tank be filled faster than the fuel can be consumed by the engine the excess will overiow into the conduit 18 and thenceback to the main supply tank 16.- f 1 llavmg thus described-my invention, I c aimiv s 1. A device lof the class described, `com- I. prising the. combination of an engine, a fuel supply source for the engine,.a source of lubricating materiaifor said engine, and adouble plston pump adapted 'QQ 'elevate Said.

materials separately from a relatively low to a relatively high level from which they areV adapted to iiow to saidl engine.

2. A' device of the class described, comy supply source for the engine, a source of f lubricating material for the engine, an auxiliary tank interposed between said fuel supply source and said engine, and a double piston pump adapted to elevate said lubricating material to the engine and said fuel to the auxiliary tank,

4. A device of the class described, comprising the combination of an engine, a fuel supply source for the engine, a source of lubricating material, an auxiliary tank interposed between vsaid fuel supply source and said engine, a double piston pump adapted to elevate said lubricating material to said engine, and said fuel to said auxiliary tank, and means actuated by the, engine for operating said pump.

5. In a device of the class described, the combination of an engine, a fuel supply source for the engine, a source of lubricating material for the engine, and a pump having a two diameter piston-connected with and adapted to be actuated by said engine for effecting the transfer of said materials fromsaid sources to said engine..

6.A device of the class described, comprising the combination of an engine and the cam shaft thereof, a fuel supply source for the engine, a source of lubricating material for the engine, and a double piston pump connected with said sources and adapted to be actuated by said cam shaft to effect the transfer of said fuel.` and lubricating ma- 'terial to the engine. v

7. A device of the class described, comprising the combinationof an engine, a c arbureter therefor, a source of lubricating ma-` terial for the engine, a vfuel supply source for the same, an auxiliary tank connected with said carbureter and fuel supply source, and a pump with a two diameterpiston actuated bysaidengine and adapted to pump said lubricatin material to said'engine and said fuel to said gravity feed tank.

8. A device of the class described, comprising the combination of an engine, a. carbureter therefor, a, fuel supply source for the engine, an auxiliary tank connected with said fuel supply source and said carbureter, 3J, SOllrCe of lubricating material for the en- "gine having a connection -eonimunicating with one end leading to the same, a pump with a two diameter piston interposed in said connection, means connecting said pumpwith said tank, and means for actuating the pump. v

9. In combination with an internal combustion engine, means for feeding liquid fuel and lubricant thereto, comprising a liquid fuel conduit and anl oil conduit, a pump cylinder, a valve casing in said oil conduit of said cylinder, a pair of check valves in said casing, Aa second cylinder connected at one end with said casing, a pipe extending from the other end of said cylinder to the liquid fuel conduit, a piston for each of said cylinders, and a mechanical connection between said pistons.

l0. In combination with an internal combustion engine, a liquid fuel conduit for conducting fuel from a low level tank to said engine, a lubricating oil conduit for 4conducting lubricant to said engine, a large pump cylinder, a valve casing in said oil conduit communicating with one end of said large cylinder, a pair of check valves in said casing, a one end with said casing, a pipe extending small cylinder connected at from the other the liquid fuel conduit, a piston for each of said cylinders, anda mechanical connection between said pistons, whereby the actuation of the large piston will effect the actuation of the small piston, and whereby the small piston will be effectively lubricated.

ll. In combination with an internal cornbustion engine, a liquid fuel conduit for conducting fuel from a low level tank to the engine, a lubricating oil conduit for conducting lubricant to said engine, a large pump cylinder, conduit communicating withx one end c f said large cylinder, a pair of check valves in said casing, a small cylinder connected at one end to said casing, a pipe extending from the other end of said small cylinder to the liquid fuel conduit, a piston for each of sail cylinders, the small piston having grooves for carrying lubricant, and a mechanical connection between said pistons whereby the actuation of the large piston will effect the actuation of the small piston, and whereby the small piston will be effectively lubricated.

In testimony whereof I affix my signatuce. CHARLES F. GREEN a valve casing in said oil` end of said small cylinder to i 

